Skip to content
CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-31414

netfilter: nf_conntrack_expect: use expect->helper

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: use expect->helper Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe. Use exp->master->helper in ctnetlink path if userspace does not provide an explicit helper when creating an expectation to retain the existing behaviour. The ctnetlink expectation path holds the reference on the master conntrack and nf_conntrack_expect lock and the nfnetlink glue path refers to the master ct that is attached to the skb.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < 847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781affected
  • ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < e7ccaa0a62a8ff2be5d521299ce79390c318d306affected
  • ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < 4bd1b3d839172724b33d8d02c5a4ff6a1c775417affected
  • ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < b53294bff19e56ada2f230ceb8b1ffde61cc3817affected
  • ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < 3dfd3f7712b5a800f2ba632179e9b738076a51f0affected
  • ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < f01794106042ee27e54af6fdf5b319a2fe3df94daffected

Linux Linux

Default version status: affected

  • 2.6.30affected
  • 0 to < 2.6.30unaffected
  • 6.1.168 to ≤ 6.1.*unaffected
  • 6.6.134 to ≤ 6.6.*unaffected
  • 6.12.81 to ≤ 6.12.*unaffected
  • 6.18.22 to ≤ 6.18.*unaffected
  • 6.19.12 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References